How severe is GHSA-j3w3-p6mr-3hrh?

No CVSS score has been assigned to GHSA-j3w3-p6mr-3hrh yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by GHSA-j3w3-p6mr-3hrh?

GHSA-j3w3-p6mr-3hrh affects the following packages: dyn-future (crates.io). Ecosystems affected: crates.io.

How do I fix GHSA-j3w3-p6mr-3hrh?

The records we use list no patched version of dyn-future for GHSA-j3w3-p6mr-3hrh. Check the maintainer's advisory, and where your build allows, override or pin the dependency away from the vulnerable range.

How do I detect GHSA-j3w3-p6mr-3hrh in my crates.io dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for dyn-future, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate GHSA-j3w3-p6mr-3hrh if there is no patch (or I can't update yet)?

If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Is GHSA-j3w3-p6mr-3hrh actively exploited in the wild?

No public exploit code has been indexed for GHSA-j3w3-p6mr-3hrh yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

When was GHSA-j3w3-p6mr-3hrh published, and has it been updated?

GHSA-j3w3-p6mr-3hrh was published on April 4, 2026 and was last updated on April 5, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🦀 crates.io

Not in CISA KEV

DynFuture Drop Can Construct a Dangling ReferenceGHSA-j3w3-p6mr-3hrh

GHSA-j3w3-p6mr-3hrh is a security vulnerability in dyn-future. The records list no fixed version yet; check the vendor advisory below and apply the mitigations in the meantime.

Also known asRUSTSEC-2026-0079

Published

Apr 4, 2026

Updated

Apr 5, 2026

Affected

1 pkg

Patched

None yet

Exploits

None indexed

Exploitation data as of Apr 5, 2026 · OSV.dev, FIRST.org (EPSS)

Real-World Exposure

1 pkg affected

🦀dyn-future

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects crates.io packages — download data is not available via public APIs for these ecosystems.

Description

DynFuture is unsound because its Drop implementation transmutes a trait-object reference into unrelated reference types, which constructs an invalid reference from trait object metadata.

This issue was reproduced against dyn-future 3.0.4 under Miri. The crate is unmaintained.

Affected Packages

1 total

Ecosystem	Package	Vulnerable range	Fix
🦀crates.io	`dyn-future`	all versions	No fix

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for dyn-future, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Remediation status
The records we use list no patched version of dyn-future for GHSA-j3w3-p6mr-3hrh. Check the maintainer's advisory, and where your build allows, override or pin the dependency away from the vulnerable range.
Mitigate without a patch
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

DynFuture is unsound because its Drop implementation transmutes a trait-object reference into unrelated reference types, which constructs an invalid reference from trait object metadata. This issue was reproduced against `dyn-future` 3.0.4 under Miri. The crate is unmaintained.

O3 Security · Impact-Aware SCA

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